Gun-cartridge.



H0. 694,895. I Patented Mar. 4, |902.

R. W. SCOTT.

GUN CARTRIDGE.

(Application led Der:` 5, 1900. Renewed Aug. 7, 1901.)

y-CNo Model.)

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vUNITED lSTATES ATnNT Fries.

ROBERT \V. SCOTT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE- HALFTOLOUIS D. WILLIAMS, OF ASHBOURNE, PENNSYLVANIA.

GUN-CARTRIDGE.

SPECIFICATION forming part of Letters Patent No. 694,895, dated. March4, 1902.

Application led December 5, 1900. Renewed August 7,1901. Serial No.71,260. (No model.)

To a/ZZ 1,071,077?, it may con/cern;

Be it known that LROBERT W. SCOTT, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented Improvements inGun-Cartridges, of which the following is a specification.

My invention consists of certain improvements in cartridge-cases, suchas those constituting the subject of my application for patent filedNovember 18, 1899, Serial No. 737,510, the object ofv my presentinvention being to prevent separation of the cartridgecase and theexternal collar applied thereto in order to fill the space which wouldotherwise be formed in the cartridge-chamber of the gun in'advance ofthe shoulder formed by decreasing` the diameter of the shell to producethe projectile-receiving neck.

In the accompanying drawings, Figure 1 is a longitudinal section, on anenlarged scale, of a cartridge constructed in accordance with myinvention. Fig. 2 is a view of the cartridge-case after the ring of thecharge. Fig. 3 is a view similar to Fig. 1, but illustrating anothermethod of carrying out` my invention; and Fig. 4 a view of thecartridge-case shown in Fig. 3 after the charge has been firedtherefrom.

In the cartridge shown and described in my application before referredto the case 2 was reduced in diameter at 3 to form theprojectile-receiving neck 1, which had therein two projectiles et,disposed one in advance of another, with an explosive charge 5 betweenthem. This produced a cartridge diering from the ordinary service orstandard cartridge in having a shorter length of expanded case forcontaining the explosive charge 5 and a greater length of contractedneck in order to adapt it for the reception of the two projectiles.Hence when Vsuch a cartridge was introduced into the cartridge-chamberof the service or standard gun the shoulder Swould be some distance inthe rear of the shoulder formed in the gun to coincide with the externalshoulder ofthe standard cartridge. Therefore in order to iill this spaceand permit use ofthe multishot-cartridge interchangeably with thestandard cartridge in the same gun Iprovided the rear portion of thereduced neck 1 with a ring or collar 6, fitting snugly thereto and tothe shoulder 3 of the cartridge-case and terminating at its forward endin a shoulder 7 toY coincide with the internal shoulder formed in thegun-chamber. It has been found in practice that this rin g or collarsometimes sticks in the chamber of the gun and is stripped from thecartridge-case when the latter is extracted, and in order to overcomethis objection I now eect the secure 6o locking together of the case andthe external ring or collar by the expansive action of the gases ofexplosion on the firing of the charge. One method of eifecting thisresult is to form in the inner Wall of the ring 6 a shallow an- 65 nularrecess 8, as shown, for instance, in Fig. 1', so that when the charge isfired the expansive force of the generated gases will distend or upsetthe cartridge-case into this recess, and thus securely lock the case andring to-` 7o gether, as shown in Fig. 2. Another method of accomplishingthe result is to cut away the forward portion of the shoulder 7 at theforward end of the ring, as shown, for instance, at 8L in Fig. 2, so asto provide for the expan- 75 sion of the cartridge-case into the spacethus formed, as shown in Fig. 4. By either of these means the materialofthe cartridge-case is expanded in front of a shoulder on the ring.Hence it becomes impossible for the ring to 8o be stripped from thecartridge-case in the act of extraction after the charge has been fired.

Of course in carrying out my invention it is not essential that theshoulder on the ring for engaging wit-h the expanded portion of thecartridge-case should be an annular shoulder, as recesses of any desiredcharacter forming one or more shoulders on the ring may be used, andinstead of relying upon the pressure of the gases of explosion forupsetting or 9o distending the cartridge-case into the recess orrecesses ofthe ring such engagement of the ring and case may be effectedby a suitable implement before the cartridge is loaded.

Having thus described my invention, I 95 claim and desire to secure byLetters Patent-- 1. A cartridge-case having a reduced andprojectile-receiving neck, and an external ring confined longitudinallybetween the roo shoulder formed by reducing the case, and an opposedshoulder in advance of the same.

2. A cartridge-case having a reduced and projectile-receiving neck, andan external ring in advance of the shoulder formed by Such reduction,Asaid ring` presenting one or more shoulders, with which the ,materialof the cartridge-case will be caused to engage b'y the expansive actionof the gases of explo s1on.

3. A cartridge-case having a reduced and projectile-receiving neck, andan external ring in advance of the shoulder formed by such reduction,said ring having an internal Shoulder-forming recess, into which thematerial of the cartridge-case will be forced by the expansive action ofthe gases of explosion.

4. A cartridge having a power-cha1nbe13 a reduced neck in advance of thesaine, containing a series of projectiles, and an external ringinadvance of the shoulder produced by reducing the case to form the neck,said ring presenting one. or more shoulders, with which the material ofthe cartridge-case will be caused to engage by elle expansive action ot'the gases of explosion.

5. A cartridge having a powder-chamber, a reduced neck in advance of thesaine, containing a series of projectiles, and an external ring inadvance of the shoulderproduced by reducing the case to form the neck,said ring having an internal shoulder-forming recess, into which thematerial of the cartridgecase will be forced by the expansive action ofthe gases of explosion.

In testimony whereof I have signed my naine to this specification in thepresence of 35 two subscribing witnesses.

ROBERT W. SCOTT. Witnesses F. E. BECHTOLD, Jos. H. KLEIN.

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